이론
A system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.
Examples
3 of 5이론은 알겠는데 실제로는 어려워요.
I understand the theory, but it's hard in practice.
새로운 경제 이론이 발표되었습니다.
A new economic theory has been announced.
그건 그냥 너의 이론일 뿐이야.
That is just your theory.
Word Family
Memory Tip
I (Reason/Principle) + Ron (Logic/Discussion) = Logic of principles.
Quick Quiz
____만 공부하지 말고 직접 해보세요.
Correct!
The correct answer is: 이론
Examples
이론은 알겠는데 실제로는 어려워요.
everydayI understand the theory, but it's hard in practice.
새로운 경제 이론이 발표되었습니다.
formalA new economic theory has been announced.
그건 그냥 너의 이론일 뿐이야.
informalThat is just your theory.
상대성 이론은 물리학의 발전에 기여했다.
academicThe theory of relativity contributed to the development of physics.
이론보다는 실무 경험이 더 중요할 때가 있습니다.
businessThere are times when practical experience is more important than theory.
Word Family
Common Collocations
Common Phrases
이론상으로는
theoretically / in theory
이론에 불과하다
to be nothing more than a theory
이론의 여지가 없다
to have no room for argument (idiom)
Often Confused With
가설 is a 'hypothesis' (unproven), while 이론 is a more established 'theory'.
Usage Notes
Frequently appears in IELTS reading passages about science, history, or social studies.
Common Mistakes
Pronouncing it as '일온'. It should be '이론'.
Memory Tip
I (Reason/Principle) + Ron (Logic/Discussion) = Logic of principles.
Word Origin
From Sino-Korean 理論 (이 - reason/logic, 론 - discussion).
Grammar Patterns
Quick Quiz
____만 공부하지 말고 직접 해보세요.
Correct!
The correct answer is: 이론
Related Vocabulary
More science words
상호작용
B2Reciprocal action or influence; how two or more entities affect each other.
잠재적
B2Having the capacity to develop into something in the future; latent or potential rather than actual or apparent.
유발하다
B2To cause or trigger a certain action, reaction, or state, often used with negative consequences like diseases or conflicts.
예측하다
B2To estimate or guess what will happen in the future based on certain data or logic. It is a frequent word in scientific or economic reporting.
안정성
B2The state or quality of being stable; the property of not changing or failing easily.
한계
B2The point, edge, or line beyond which something cannot or may not proceed; a limitation or boundary.
가설
B2A temporary explanation or idea that is suggested to explain something, but has not yet been proven true through research or experiments.
인과관계
B2The relationship between a cause and its effect. In academic contexts, it refers to how one event leads to another.
관찰하다
B2To watch someone or something carefully and attentively over a period of time. This is often done to learn something or discover information.
원리
B1The basic truth, law, or mechanism that explains how something works or why something happens. It is the fundamental basis of a system or theory.
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